What do you mean with Album Art support? There's something in the zip called JacketImageConverter, which 'converts' your cover that it fits the top screen of the Nintendo DS.

Here's the readme:

This tool adds the function to MoonShell2. It is an image of the album jacket style.Please put jacket.bmp on the same folder as the music file. It is displayed at the same time as music play. Jacket.bmp is a usual BMP file of pixel size fixation. You may make it with other application programs and the conversion tools (GIMP or InfanView, etc.) too. jacket.bmp file is 256x192pixels, 8bit or 24bit color, not-compressed, Windows bitmap format.